
    public class Date {
        public int year = 1900;
        public int month = 1;
        public int day = 1;
        public Date(){
        }
        public Date(int year, int month, int day) {
        }
        public static void main(String[] args) {
            Date d1 = new Date(2021,6,9);
            Date d2 = new Date();
        }
    }

